28643301 has 10 divisors (see below), whose sum is σ = 42788262. Its totient is φ = 19095480.

The previous prime is 28643299. The next prime is 28643311. The reversal of 28643301 is 10334682.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20657025 + 7986276 = 4545^2 + 2826^2 .

It is not a de Polignac number, because 28643301 - 2¹ = 28643299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28643311) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 176730 + ... + 176891.

Almost surely, 2^28643301 is an apocalyptic number.

It is an amenable number.

28643301 is a deficient number, since it is larger than the sum of its proper divisors (14144961).

28643301 is an equidigital number, since it uses as much as digits as its factorization.

28643301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353633 (or 353624 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 28643301 is about 5351.9436656228. The cubic root of 28643301 is about 305.9668360829.

Adding to 28643301 its reverse (10334682), we get a palindrome (38977983).

The spelling of 28643301 in words is "twenty-eight million, six hundred forty-three thousand, three hundred one".